I dug out my old lense Carl Zeisse f1.4 50mm and mount into a new DSLR body, with adapter it works! After 18 years in dry cabinet, it is still crystal clear.
I am not sure what are the limitation to this.
Auto focus off, no problem with manual focus. I set the camera in Manual mode, aperture, can set from the lense, exposure and ISO, manually set for every shot. Picture turn out really nice.
I wonder what are better way to do this..but if I have to set manual, set Aperture, ISO, speed in every shot would be cumbersome. If no choice, I would just have to live with it and enjoy the good old days style.
Appreciate if anyone can advise.